Check your batteries' trickle chargers! - Page 2 - Fiberglass RV


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Old 01-09-2011, 10:16 PM   #15
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See www.batteryfaq.org/ for more good information.

-- Dan Meyer
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Old 01-10-2011, 02:22 PM   #16
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Update, my battery was very low on water, filled it back up and it charged up fine, glad it wasn't dead. Also, it was still working before I filled it up with distilled water. Back on trickle charge and it shows it's fully charged.
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Old 01-10-2011, 05:51 PM   #17
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I killed a new deep cycle last winter. had it on wood blocks but somehow it was moves to the basement floor... dead!

those new ones that look like 6 cans of pop may be different.


[QUOTE=John Hussey;233155]For modern batteries it is a myth.
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Old 01-12-2011, 06:29 PM   #18
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Originally Posted by Panoz77 View Post
There is no way the battery would give off enough hydrogen to get the concentration of gas to the lower explosive limit, I'm not worried about that.
Believe a battery can explode.....maybe not your basement but that battery sure can and I'll detonate it for you if you wanna see......while its boiling
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Old 01-12-2011, 08:26 PM   #19
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I don't think I said that a battery can't explode, but I did say that I didn't think it would give off enough flammable gas in my basement to cause an explosion due to buildup of hydrogen offgassing. I have seen batteries explode.
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Old 01-12-2011, 09:38 PM   #20
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As DC current is passing through a lead acid battery it charges the battery by changing PbSO4 to Pb on the negative electrode and PbSO4 to PbO2 and on the positive electrode. Any excess current electrolyzes water to 2:1 stoichiometric mixture of hydrogen and oxygen. That mixture is highly explosive by itself, it does not need air. If battery bubbles due to charging it is either boiling hot making water vapor or produces the stoichiometric mixture of hydrogen and oxygen. I cannot explain “concrete phenomena” but potential of explosion of overcharged battery is definitely probable.
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Old 01-13-2011, 05:32 AM   #21
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Am I correct in thinking freezing will kill a battery even if the case does not crack?
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Old 01-13-2011, 10:40 AM   #22
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Most seasons we will get a few -10 F days. Once in a while -20 F. And many years ago I recall below -30 F. I have never had a battery freeze. That said if a battery were to freeze here, it would be because of a weak electrolyte, i.e. mostly water . In that case the battery is almost dead to begin with. Also, I would be very surprised if the case didn't crack if it froze solid. Raz
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Old 01-13-2011, 11:41 AM   #23
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I am wondering if I can stored charged batteries in the garge, temps to -20F. An earlier post suggested that low temps may slow discahrge.
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Old 01-13-2011, 12:24 PM   #24
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Freezing temperature of sulfuric acid in fully charged lead acid battery is -70F (34% acid) and in fully discharge battery is -12F (17% acid). Regarding a concrete floor I don’t see physics which could explain it in the modern battery; I believe it is a myth.
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Old 01-13-2011, 12:35 PM   #25
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I have owned inboard boat's since 1969 and never take the batteries out and never had a problem. I just make sure they are fully charged in the fall and check them once in a while during the winter.

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I am wondering if I can stored charged batteries in the garge, temps to -20F. An earlier post suggested that low temps may slow discahrge.
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